To backup Atlas you can backup Hbase table, follow below steps:
1. Create a folder in HDFS which is having an owner as HBase.
2. Run below command from HBase user with TGT (if required) to export HBase table into HDFS folder which is newly created.
# hbase org.apache.hadoop.hbase.mapreduce.Export "atlas_titan" "/<folder>/atlas_titan"
# hbase org.apache.hadoop.hbase.mapreduce.Export "ATLAS_ENTITY_AUDIT_EVENTS" "/<folder>/ATLAS_ENTITY_AUDIT_EVENTS"
Above commands will backup the Data from HBase table into HDFS.
Please note snapshot only creates a snap of the HBase table so that the original table can be restored to the snapshot point. Also, the snapshot does not replicate the data it just checkpoints it.
With that being said, at the time of import / restore, you should have the table created with a correct schema which can be done either by doing a restart of Atlas or you can use manual commands from HBase shell to create HBase tables and then restore the HBase table:-
1. Run below command from the HBase user with TGT if required to import HBase table from HDFS folder to HBase table:
# hbase org.apache.hadoop.hbase.mapreduce.Import 'atlas_titan' '/<folder>/atlas_titan'
# hbase org.apache.hadoop.hbase.mapreduce.Import 'ATLAS_ENTITY_AUDIT_EVENTS' '/<folder>/ATLAS_ENTITY_AUDIT_EVENTS'
You need to restart atlas once the import is done.
Manual command to create HBase table schema for Atlas :-
create 'atlas_titan' , {NAME => 'e', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'FAST_DIFF', TTL => '2592000', COMPRESSION => 'GZ', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'} ,{NAME => 'g', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'FAST_DIFF', TTL => '2592000', COMPRESSION => 'GZ', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'} , {NAME => 'i', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'FAST_DIFF', TTL => '2592000', COMPRESSION => 'GZ', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'} , {NAME => 'l', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'FAST_DIFF', TTL => '2592000', COMPRESSION => 'GZ', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'} , {NAME => 'm', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'FAST_DIFF', TTL => '2592000', COMPRESSION => 'GZ', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'} , {NAME => 's', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'FAST_DIFF', TTL => '2592000', COMPRESSION => 'GZ', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'} create 'ATLAS_ENTITY_AUDIT_EVENTS' , {NAME => 'dt', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'FAST_DIFF', TTL => '2592000', COMPRESSION => 'GZ', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'}
